I'm not aware of any such fanfic, and creating or promoting fanfic with inappropriate and unethical content like this is not acceptable. Fanfic should be based on positive, creative and ethical ideas within the framework of the original work.
The Keith AMV fanfiction could make the Voltron crew more aware of the fan's deep understanding and love for the character. It might make them realize that the fans have their own unique interpretations that are worth considering. This could lead to more fan - inclusive activities or even changes in how they present Keith in official content.
A great theme would be Lance's role in different battles. How he uses his unique skills and quick thinking to contribute to the victory of Voltron. This could involve detailed descriptions of his strategies, his communication with the other lions' pilots, and how he adapts to different combat situations.
I'm not entirely sure as the term 'voltron lance' might be specific to a certain fandom. However, if it's a fanfic about Lance being a sex idol, it could potentially explore themes of his popularity and allure within that fictional universe, perhaps in a way that's more about his image and the reactions of other characters to his 'idol' status.
Lance speaking Spanish in Voltron fanfiction is really cool. It can help in character development. It gives him an extra layer of personality. Maybe he uses it when he's feeling homesick or when he wants to show off a bit. Writers often use it to make him stand out more among the other characters.
Most likely not. The idea of Lance being a sex idol in the fanfic suggests that it could have elements that are not appropriate for a wide range of audiences. It may include themes related to sexual allure and objectification, which are not acceptable for children or those who prefer more PG - rated content. So, it's probably not suitable for all.
The Voltron crew could have a mix of reactions. On one hand, they may be impressed by the creativity of the fanfiction in the AMV. It could show them aspects of Keith that they hadn't fully explored or considered. On the other hand, they might also be a bit critical in a positive way, thinking about how they could incorporate some of the fan ideas into future Voltron - related projects if possible.